Whakaoti i te 7^2+35^2-27*35*cos45^circ

$$7 ^ { 2 } + 35 ^ { 2 } - 27 \times 35 \times \cos 45 ^ { \circ }$$

Aromātai

$$-\frac{945\sqrt{2}}{2}+1274\approx 605.784091779$$

Ngā Hipanga Rongoā Poto

Tātaihia te 7 mā te pū o 2, kia riro ko 49.

$$49+35^{2}-27\times 35\cos(45)$$

Tātaihia te 35 mā te pū o 2, kia riro ko 1225.

$$49+1225-27\times 35\cos(45)$$

Tāpirihia te 49 ki te 1225, ka 1274.

$$1274-27\times 35\cos(45)$$

Whakareatia te 27 ki te 35, ka 945.

$$1274-945\cos(45)$$

Tīkina te uara \cos(45) mai i te ripanga uara pākoki.

$$1274-945\times \frac{\sqrt{2}}{2}$$

Tuhia te 945\times \frac{\sqrt{2}}{2} hei hautanga kotahi.

$$1274-\frac{945\sqrt{2}}{2}$$

Hei tāpiri, hei tango kīanga rānei, me whakaroha ērā kia rite ā rātou tauraro. Whakareatia 1274 ki te \frac{2}{2}.

$$\frac{1274\times 2}{2}-\frac{945\sqrt{2}}{2}$$

Tā te mea he rite te tauraro o \frac{1274\times 2}{2} me \frac{945\sqrt{2}}{2}, me tango rāua mā te tango i ō raua taurunga.

$$\frac{1274\times 2-945\sqrt{2}}{2}$$

Mahia ngā whakarea i roto o 1274\times 2-945\sqrt{2}.

$$\frac{2548-945\sqrt{2}}{2}$$